Gas solubility in ionic liquids, which are molten salts with melting temperatures below 373K, plays an important role in various chemical applications. Ionic liquids have received significant attention due to their low vapor pressure, high chemical and thermal stability, and the large amount of cations and anions that can be combined to form an ionic liquid.
Ionic liquids have traditionally been considered new solvents for both separations and chemical reactions, according to Mark Shiflett at the Univ. of Kansas and Ed Maginn at the Univ. of Notre Dame, who focus on the topic of gas solubility in these liquids in their Perspective article, “The Solubility of Gases in Ionic Liquids,” published in November’s AIChE Journal.
Data on gas solubility and mass transport in the ionic liquid phase are needed to design the absorption (desorption) columns and chemical reactors that are used in gas separations and gas-liquid reactions. Other applications that require knowledge of gas solubility in ionic liquids include absorption cooling, polymerization, membranes, lubrication, extraction, and gas-expanded liquids.
Shiflett and Maginn focus on the importance of characterizing complete phase behavior over a wide range of temperatures and pressures, utilizing simulation tools to understand the molecular...
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